Join the Greater Gallatin Watershed Council and Gallatin Valley Land Trust for a family-friendly evening of play and discovery in the creeks along the Gallagator trail. Kids can be a scientist with hands-on activities to measure stream flow and water chemistry in Matthew Bird Creek and examine aquatic insects in Bozeman Creek. Wear water shoes or sandals with straps. Recommended for ages 6 and up. Meet at the Bogert Park Pavilion.